Improvement in fog-horns



P. THOMPSON.

FOG-HORN.

No. 189,587. Patented Apri117, 1877.

N PETERS, PHD'RS-LITIIOGRAPNER. WASHINGTON. n C

UNITED STATES PATENT QFFIGE PETER THOMPSON, OF OALAIS, MAINE, ASSIGNOR TO HIMSELF, WILLIAM B. TAYLOR, AND GEORGE A. BLAKE, OF SAME PLACE.

IMPROVEMENT IN FOG-HORNS.

Specification forming part of Letters Patent No. 189,587, dated April 17, 1877; application filed March 6, 1877.

To all whom it may concern:

Be it known that I, PETER THOMPSON, of Calais, in the county of Washington and State of Maine, have invented a new and useful or Improved Fog-Horn; and do hereby declare the same to be described in the following.

specification and represented in the accompanying drawings, of which-- Figure 1 is a side view, Fig. 2 a front view,

and Fig. 3 a longitudinal section, of it.

the axis of the cone in manner as represented.

Furthermore, a blast or induction tube, 0, is led out of and down into the rear part of the trumpet, and with respectto the upper edge of the cone B, in manner as represented.

On applying the mouth to the outer end of the tube (J, and blowing air into such and against the lower part of the upper edge of the cone B, the horn may be sounded with ease and to great advantage.

I claim The fog-horn, substantially as described, composed of the trumpet A, the hollow cone or vessel B, and the blast or induction pipe 0, arrar ged essentially as set forth.

. PETER THOMPSON. Witnesses:

LEvI L. LOWELL, FRANK NELsoN. 

